Our build guides are in English only at the moment, including the Wacky Robots guides on our Resources page. There is no Croatian version, and we do not have a date for one.
The guides are built around photographs, diagrams and numbered steps rather than long passages of text, so most of what you need is in the pictures.
If you are a school or organisation in Croatia and you need Croatian-language materials, message us here, or email [email protected], and tell us what you need and for how many pupils. Requests like that are what we go on when we decide which languages to add next.